| 摘要 |
NEW MATERIAL:The compound of formula I {M is tri or tetravalent metal; X<1> to X<8> are H or amino provided that X<1> and X<2>, X<3> and X<4>, X<5> and X<6>, and X<7> and X<8> are different from each other; Y is -OSiR<1>R<2>R<3> [R<1> to R<3> are (substituted) alkyl, (substituted) aryl, (substituted) aralkyl, (substituted) alkoxy, (substituted) aryloxy, (substituted) polyether, OH or H]; n is number of Y and is 1 or 2}. USE:Organic pigment for write-once optical disk. PREPARATION:The compound of formula II is made to react with a halogenated silicon compound of formula XSiR<1>R<2>R<3> (X is halogen) in the presence of an organic base compound. |
